Find the Equation of the Tangent Plane to the Given $f ( x , y ) = 4 x ^ { 3 } y - 7 x ^ { 2 } y , ( 1,1 , - 3 )$

Short Answer

Find the equation of the tangent plane to the given surface at the specified point. $f ( x , y ) = 4 x ^ { 3 } y - 7 x ^ { 2 } y , ( 1,1 , - 3 )$